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1120 pj 1
/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *   (see the web pages for full authors list)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://shark.sssup.it
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 */
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/*
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 * Copyright (C) 2000 Paolo Gai
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 *
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 * CVS :        $Id: preempt.c,v 1.4 2005-01-08 14:31:38 pj Exp $
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 CBS test with preemption disabling
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*/
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#include "kernel/kern.h"
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void *periodic(void *arg)
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{
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  int i;
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  int y = (int)arg;
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  for (i = 19; i < 60; i++) {
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    puts_xy(i,y,7,"*");
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    task_endcycle();
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  }
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  cprintf("Periodic: Task %d end.\n", exec_shadow);
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  return 0;
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}
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void *blocker(void *arg)
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{
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  struct timespec t;
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  task_nopreempt();
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  cprintf("Blocker: Task nopreempt\n");
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  do {
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    sys_gettime(&t);
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  } while (t.tv_sec < 5);
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  cprintf("Blocker: Task preempt\n");
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  task_preempt();
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  cprintf("Blocker: end\n");
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  return 0;
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}
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int main(int argc, char **argv)
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{
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  struct timespec t;
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  NRT_TASK_MODEL m;
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  SOFT_TASK_MODEL m_aper;
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  PID p;
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  clear();
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  cprintf("Preemption Test.\n");
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  cprintf("Start time: two periodic tasks and a blocker are created and activated.\n");
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  cprintf("2 seconds : blocker calls task_nopreempt.\n");
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  cprintf("5 seconds : task_preempt is called.\n");
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  cprintf("            The blocked task exec its pending activations.\n");
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  cprintf("10 seconds: the test stops.\n");
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  puts_xy(1,20,7,"save task:");
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  puts_xy(1,21,7,"skip task:");
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  nrt_task_default_model(m);
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  soft_task_default_model(m_aper);
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  soft_task_def_met(m_aper,10000);
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  soft_task_def_period(m_aper,200000);
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  soft_task_def_group(m_aper,1);
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  soft_task_def_arg(m_aper, (void *)20);
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  soft_task_def_periodic(m_aper);
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  p = task_create("save", periodic, &m_aper, NULL);
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  if (p == NIL)
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    {
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      sys_shutdown_message("Can't create save task...\n");
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      exit(1);
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    }
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  soft_task_def_skip_arrivals(m_aper);
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  soft_task_def_arg(m_aper, (void *)21);
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  p = task_create("skip", periodic, &m_aper, NULL);
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  if (p == NIL)
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    {
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      sys_shutdown_message("Can't create skip task...\n");
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      exit(1);
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    }
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  p = task_create("blocker", blocker, &m, NULL);
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  if (p == NIL)
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    {
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      sys_shutdown_message("Can't create blocker task...\n");
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      exit(1);
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    }
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  cprintf("main   : save & skip tasks activated.\n");
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  group_activate(1);
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  do {
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    sys_gettime(&t);
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  } while (t.tv_sec < 2);
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  cprintf("main   : blocker activated.\n");
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  task_activate(p);
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  do {
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    sys_gettime(&t);
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  } while (t.tv_sec < 10);
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  cprintf("main   : End!!!\n");
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  return 0;
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}